Features Oval chip hole design for chip discharge and low cutting resistance, enhancing drilling efficiency. Diamond material blade offers high hardness and durability for efficient drilling through marble, glass, and ceramic. Compatible with hand drills, bench drills, and other equipment for faster drilling. Anti-slip handle design for secure clamping, strong , and overall stability during use. Suitable for various materials including stone, marble, concrete, ceramics, vitrified tiles, and glass. Features: 1、The oval chip hole design is more conducive to the discharge of chips, and the cutting resistance is small. 2、Diamonds material blade for high hardness and durability, sharpened for high drilling efficiency. 3、Use with hand drills, bench drills and other equipment to facilitate faster drilling. 4、Anti？slip handle design, suitable for clamping, strong torgue, overall stability. 5、Suitable for all kinds of stone, marble, concrete, ceramics, vitrified tiles, glass, etc. Specification: Conditon: 100% Item Type: Marble Hole Bit Material: Diamond Process: Brazing Color: Golden Hole Diameter: Approx. 14mm/0.55in, 16mm/0.63in, 18mm/0.71in, 20mm/0.79in, 22mm/0.87in, 25mm/0.98in Handle Diameter: Approx. 8mm/0.31in Specification: 6Pcs/ Set Applicable Equipment: Electric drill, bench drill Range of Application: Suitable for all kinds of stone, ceramics, vitrified tiles, glass, etc. Package List: 6 x Marble Hole Bit Package List 6 x Marble Hole Bit